Day one of US Open in New York
Defending champion Aryna Sabalenka beats Rebeka Masarova 7-5 6-1
World number one Sabalenka seeking first major of year
Emma Raducanu drops just three games against Ena Shibahara to reach second round
First time Raducanu has gone past first round at Flushing Meadows since 2021 title run
Home hopes Taylor Fritz and Ben Shelton through; Novak Djokovic and Jessica Pegula in night session
*Raducanu 6-1 5-2 Shibahara
Leon Smith
Former GB Davis Cup captain on BBC Radio 5 Live
It has been a progressive year for Raducanu. Health and fitness is in a much better place, she should end up seeded at the Slams next year.
Shelton 1-0 Buse*
Strong start from Shelton.
The American barely breaks sweat as he holds to love.
*Raducanu 6-1 5-2 Shibahara
Good stuff from Ena Shibahara.
She ensures Emma Raducanu will have to serve it out if she wants to win this match.
Raducanu 6-1 5-1 Shibahara*
Fair play to Ena Shibahara, she's not letting this go without a fight.
She earns a break point, which Emma Raducanu saves with a good piece of work at the net.
The Briton then earns an advantage with a brilliant piece of footwork to get to a ball near the net, before closing out the hold.
Image source, Getty ImagesMensik 7-6 Jarry
Jakub Mensik has two set points, but after a brutal 131mph serve he gets too cute and nets a drop shot!
No matter though - Nicolas Jarry goes long after Mensik returns his second serve and the 19-year-old takes the first set.
The Czech teenager lets out a roar in celebration as he pumps his fist in the direction of his support team in the stands.
*Raducanu 6-1 4-1 Shibahara
Katie Smith
Presenter on BBC Radio 5 Sports Extra and BBC Sounds
Emma Raducanu under a little bit of pressure here on her serve.
Shelton v Buse
The first match taking place inside the Arthur Ashe stadium at this year's US Open is just about to get under way.
Sixth seed Ben Shelton is facing Peruvian qualifier Ignacio Buse who is making his Grand Slam main draw debut.
Both players are out on the court and just going through their pre-match preparations.
*Raducanu 6-1 4-1 Shibahara
Ena Shibahara gets on the board in this second set.
Much better serving from the 27-year-old, who affords herself a smile at the end of the game despite the scoreline.
Mensik 6-6 Jarry*
Mensik holds as Jarry makes a couple of unforced errors - into a tie-break we go.
Raducanu 6-1 4-0 Shibahara*
Emma Raducanu holds to love. Again.
We've just reached the 46th minute of this contest and Ena Shibahara will be lucky if it goes over an hour.
*Raducanu 6-1 3-0 Shibahara
Leon Smith
Former GB Davis Cup captain on BBC Radio 5 Live
Emma is doing a good job. She's getting the consistency right, she's totally aware of how her opponent is feeling on the court. Raducanu has the right balance of play.
Image source, Reuters*Mensik 5-6 Jarry
Nicolas Jarry holds serve again with an unstoppable forehand finisher. It looks like this game could be heading for a tie-breaker, and the Chilean is in the ascendancy.
*Raducanu 6-1 3-0 Shibahara
It's one-way traffic right now.
Emma Raducanu breaks her Japanese opponent for the second time in this second set.
The Briton's won nine of the 10 games in the match so far.
It feels like a matter of time before she books her place in the next round.
Raducanu 6-1 2-0 Shibahara*
This is seriously impressive stuff from Emma Raducanu.
She holds to love, immediately piling the pressure back on her Japanese opponent.
The Briton's got an air of assurance about her right now, illustrated by the fact she's made just four unenforced errors.
Ena Shibahara, by contrast, has made 22.
Image source, Reuters
Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows
The crowd are treated to a comedy interlude after the first game of the second set - from the courtside photographers.
One falls over the hoarding and rolls onto his back on the court, then another one stumbles after helping his colleague up.
Thankfully both guys are fine with only their pride hurt. So a few around Armstrong can't help but snigger.
*Raducanu 6-1 1-0 Shibahara
Leon Smith
Former GB Davis Cup captain on BBC Radio 5 Live
Raducanu is a Grand Slam champion and the level of a top 10. If you get fit, surround yourself with good people and are consistent with your work, look what's happening - she is just going up and up.
*Raducanu 6-1 1-0 Shibahara
It's more of the same in this second set as Emma Raducanu breaks early once again.
Ena Shibahara, after her fourth double fault of the match, saves three break points before the Briton tightens her grip on the match by taking her fourth chance.
Raducanu 6-1, 0-0 Shibahara
Leon Smith
Former GB Davis Cup captain on BBC Radio 5 Live
It’s pretty much a set of unforced errors. Good start from Raducana, the synergy between her and her coach looks excellent. More of the same!
*Mensik 4-5 Jarry
Nicolas Jarry is back in this! The Chilean sets up two break points with a fortuitous shot that clips the net and wrong-foots Jakub Mensik.
Mensik saves the first, but then completely shanks a forehand return and Jarry breaks. We're back on serve.
Jarry then holds serve - his first serves today have been excellent.
Raducanu 6-1 0-0 Shibahara*
Well, that didn't take long did it? About 27 minutes in fact.
Emma Raducanu takes the first set with relative ease, dropping just one game in the process.
The Briton looked at her composed best there, tying up the first set with a simple smash at the net.
Superb stuff from the British number one.
Image source, Getty Images
